JPH0920475A - Elevator abnormality diagnosis device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an elevator abnormality diagnosis device capable of performing appropriate abnormality diagnosis, identifying the location of an abnormality in a short time, and constantly performing abnormality diagnosis and communicating the diagnosis result to the outside. A means for detecting a plurality of accelerations, a means for distributing a detected value to two types of analysis methods, a means for storing a normal value of the distributed accelerations, a means for comparing a normal value with a detected value, Abnormality diagnosis provided with means 15 for measuring the time difference of occurrence of a plurality of accelerations distributed separately from the above-mentioned analysis method, means 16 for identifying an abnormal portion from the time difference of occurrence, and means 17 for judging an abnormality from these two types of analysis results. Means 18
And means 19 for transferring the signal of the diagnostic result to the outside and to the elevator controller. [Effect] It is possible to perform safer elevator abnormality diagnosis and detect a wide range of abnormality.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator abnormality diagnosing device, and more particularly to an elevator abnormality diagnosing device for diagnosing an abnormality using acceleration.

[0002]

2. Description of the Related Art In the conventional abnormality diagnosis of an elevator using acceleration, an elevator maintenance worker uses an acceleration measuring device and visually checks the recorded result to judge whether it is acceptable or not.

[0003]

In the above-mentioned conventional method, there is a possibility that the diagnosis result may vary depending on the experience and skill of the maintenance personnel. Further, in order to specify the location of the abnormality, it is necessary to attach the acceleration detecting device to a plurality of different locations, and it takes time to identify the location of the abnormality. Further, when an abnormality occurs other than when the measurement is performed, there is a problem that the occurrence of the abnormality is unknown.

An object of the present invention is to eliminate the variation in the diagnosis result due to the experience and skill, which has been a problem in the prior art.
An object of the present invention is to provide an elevator abnormality diagnosing device capable of providing a more appropriate diagnosis result, identifying an abnormal place in a short time, and constantly making an abnormality diagnosis and communicating the diagnosis result to the outside.

[0005]

According to the present invention, a means for detecting a plurality of accelerations during operation of an elevator, a means for distributing the detected accelerations to two kinds of analysis methods, and a means for storing a normal value of the distributed accelerations. , A means for comparing the detected acceleration with a normal value, a means for measuring the time difference of occurrence of acceleration distributed separately from the above-mentioned analysis method, a means for identifying an abnormal part from the time difference of occurrence, the results of these two types of analysis, that is, the compared values , And the result of the means for identifying the abnormal part, the abnormality diagnosis means having means for judging whether the signal is normal or abnormal, the importance of the part, and whether or not the operation can be continued, and the diagnosis result and elevator stop Means for transferring the signal to the outside and to the elevator controller.

[0006]

In the present invention, a plurality of accelerations when the elevator is operating are detected. Since the detected acceleration is analyzed in two types, it is distributed to each analysis method. The initial value of the distributed acceleration, that is, a normal value is stored as a normal value. The acceleration detected after the second time is compared with a normal value. With respect to a plurality of accelerations separately distributed from the above, the time difference of occurrence is measured, and the position where the abnormality has occurred, that is, the abnormal portion is specified from the time difference of occurrence of acceleration. The compared value, the identification of the abnormal portion, the normality or abnormality, the importance of the portion, and the output content of the signal are determined from these analysis results. According to the judgment result,
The diagnostic result signal and the elevator stop signal are transferred to the outside and the elevator controller.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an elevator abnormality diagnosis apparatus according to the present invention.

In the abnormality diagnosing device of the present embodiment, the acceleration detecting means 1 detects a plurality of accelerations during the elevator operation, and the abnormality diagnosing means 18 detects the detected accelerations to determine whether the abnormality is normal or abnormal. Is important, continues operation, outputs diagnostic result signal and elevator stop signal,
The transfer means 19 transfers the result of the abnormality diagnosis means 18 to the outside and the elevator control device.

FIG. 2 shows a detailed view of the abnormality diagnosing means 18 of FIG. 1, in which the acceleration detected by the acceleration detecting means 1 is distributed by the distributing means 11 to two kinds of analysis methods, and the first value of the distributed acceleration, that is, The normal value is stored in the normal value storage means 13,
The comparing means 14 compares the second and subsequent distributed accelerations with the normal value stored in the normal value storing means 13. Distribution means 11
The generation time difference measuring means 15 measures the respective generation time differences of a plurality of accelerations distributed by the different analysis method from the above, and the abnormal position is detected from the measurement result, that is, the abnormal part is specified by the abnormal part specifying means 16. To do. Using the results obtained by the above-described two types of analysis methods, that is, the results of the comparing unit 14 and the abnormal region specifying unit 16, whether the abnormality is normal or normal, whether the abnormal portion is important or whether the operation is continued, The determination means 17 determines whether to output the diagnosis result signal and the elevator stop signal.

Next, the operation of the present invention will be described. FIG.
A flowchart for performing abnormality diagnosis is shown in FIG. In order to measure vibration during elevator operation, it is determined whether the elevator is operating as shown in step S1. If it is in operation at step S2, a plurality of accelerations of the elevator are detected. The acceleration detected in step S3 is distributed so as to perform two types of analysis. In step S4, it is determined whether the distributed acceleration is the initial value, and if it is the initial value, it is stored as a normal value as shown in step S5. If it is the second or later value, it is compared with a normal value in step S6. In step S7, the plurality of accelerations separately distributed determines the time difference between the accelerations. Then, in step S8, the abnormal portion is specified based on the measured time difference.
Abnormality determination is performed using two types of analysis results. First, in step S9, it is determined whether the compared value is within the allowable value. If the compared value is within the allowable value, the operation continues as shown in step S10. If the allowable value is exceeded, the abnormal portion is detected as step S11. Determine if it is an important part. If it is an important part, as shown in step S14, a failure signal and an operation stop signal are output to the outside and the elevator control device to stop the operation, and if it is not an important part, it is determined in step S12 whether the operation is possible. If the operation is possible, the caution signal is output in step S13 to continue the operation. If the operation is not possible, the failure signal is output and the operation is stopped as described above.

An example of the abnormality diagnosis will be specifically described with reference to FIGS. 4, 5, and 6. FIG. 4 shows a structural diagram of an elevator door. FIG. 5 shows a detected acceleration waveform. FIG. 6 shows the relationship of the acceleration generation position due to the time delay of the acceleration. The structure of the elevator door is such that the door panels 31a and 33b are hung openably and closably via the door hangers 32a and 32b on the door rail 31 horizontally mounted on the upper part of the elevator doorway.
The door guide shoes 34a, 34b, 34c, 34d attached to the lower ends of the door panels 33a, 33b are guided by the groove of the sill 37. Acceleration detection means 38a, 38b, 38, which are components of the elevator abnormality diagnosis device
c is attached to the door panel 33a at a distance of S2, S3, S4 from the door guide shoe 34a. Suppose that the speed at which the acceleration is transmitted in the door panel is V, the damping rate of the acceleration per unit distance is C, and an abnormality such as a foreign object is caught in the door guide shoe 34a and an abnormal acceleration 50a occurs. The acceleration detected by the device 38a is a waveform 51a that is delayed by t3 time from the generation of the acceleration 50a and the detected value is also attenuated to L3. Similarly, the acceleration detected by the acceleration detection device 38b is t after the generation of the acceleration 50a.
The waveform 51b is delayed by 2 hours and the detected value is also attenuated to L2. Similarly, the acceleration detected by the acceleration detection device 38c is
The waveform 51c is delayed by t4 from the generation of the acceleration 50a, and the detected value is attenuated to L4. This acceleration time delay t2,
The t3, t4 and the acceleration transmission distances L2, L3, L4 are (Equation 1), (Equation 2), (Equation 3), (Equation 4), (Equation 5), (Equation 6), respectively.

T2 = S3 / V ... (Equation 1) t3 = S2 / V ... (Equation 2) t4 = S4 / V ... (Equation 3) L2 = L1 (1-C × S3) ... (Equation 4) L3 = L1 (1-C * S2) ... (Equation 5) L4 = L1 (1-C * S4) ... (Equation 6) As can be seen from (Equation 4), (Equation 5), (Equation 6), the acceleration detecting means 38a. , 38b, 38c, the acceleration transmission distance S2 is greater than the acceleration actually generated.
Since the attenuation is caused by S3 and S4, the allowable value is set to L in consideration of the amount of attenuation. If any one of L2, L3, and L4 exceeds the set allowable value, it can be determined that an abnormality has occurred. The acceleration transmission distances S2, S3,
Actually, S4 and acceleration time delays t1, t2, and t3 are unknown. Therefore, (Equation 1), (Equation 2), and (Equation 3) are modified, the difference in acceleration transmission distance is obtained from the difference in acceleration time delay, and the location of the abnormality is obtained from the difference in acceleration transmission distance. The difference in acceleration transmission distance is as shown in (Equation 7) and (Equation 8). In the acceleration detecting means 38a and 38b, (Equation 7)
There is a difference in the acceleration transmission distance obtained in. The position satisfying the difference in the acceleration transmission distances is on the line 61, and similarly, the position where the difference in the acceleration transmission distances of (Equation 8) occurs in the acceleration detecting means 38a and 38c is on the line 60. From this, the position that satisfies the relationship of all the differences in the transmission distance of acceleration is line 6
It can be seen that it is the intersection of 0 and the line 61. Ie line 6
The intersection of 0 and the line 61 can be determined to be the abnormal position, and the abnormal portion can be identified as the door guide shoe 34a.

S2−S3 = V × (t3−t2) (Equation 7) S4−S2 = V × (t4−t3) (Equation 8) In this embodiment, the acceleration detecting means is provided at three locations. The number of acceleration detecting means may be increased in order to improve the accuracy of detecting an abnormality.

According to the present invention, it is possible to eliminate the variation in the diagnosis result due to the experience and skill, which has been a problem in the prior art, and it is possible to perform more appropriate abnormality diagnosis. Further, since the abnormality is constantly diagnosed and the diagnosis result is communicated to the outside, a safer abnormality diagnosis of the elevator can be performed. Further, since the abnormality is detected and the abnormal portion is specified by using the plurality of acceleration detecting means, it is possible to detect the abnormality in a wide range.

[0015]

According to the present invention, it is possible to eliminate the variation in the diagnosis result due to the experience and skill level, which has been a problem in the prior art, and it is possible to perform more appropriate abnormality diagnosis. Further, since the abnormality is constantly diagnosed and the diagnosis result is communicated to the outside, a safer abnormality diagnosis of the elevator can be performed. Further, since the abnormality is detected and the abnormal portion is specified by using the plurality of acceleration detecting means, it is possible to detect the abnormality in a wide range.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an elevator abnormality diagnosing device of the present invention.

FIG. 2 is a detailed view of an abnormality diagnosis means of FIG.

FIG. 3 is a flowchart of abnormality diagnosis.

FIG. 4 is a structural diagram of an elevator door.

FIG. 5 is an explanatory diagram of a detection waveform of acceleration.

FIG. 6 is an explanatory diagram of a time delay of acceleration and an acceleration generation place.

[Explanation of symbols]

 1 Acceleration Detection Means 11 Distribution Means 13 Normal Value Storage Means 14 Comparison Means 15 Generation Time Difference Detection Means 16 Abnormal Part Identification Means 17 Judgment Means 18 Abnormality Diagnosis Means 19 Transfer Means 31 Door Rails 32a Door Hangers 32b Door Hangers 33a Door Panels 33b Door Panels 34a Door Guides Shoe 34b door guide shoe 34c door guide shoe 34d door guide shoe 37 threshold 38a acceleration detecting means 38b acceleration detecting means 38c acceleration detecting means 50a waveform 51a waveform 51b waveform 51c waveform

Front page continued (72) Inventor Takashi Fujimoto 1-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside Hitachi Building System Service Co., Ltd.

Claims (1)

[Claims] 1. A means for detecting a plurality of accelerations during elevator operation, a means for distributing the detected accelerations to two kinds of analysis methods, a means for storing a normal value of the distributed accelerations, and a normal value and the detected accelerations. A means for comparing, a means for measuring the generation time difference of the acceleration distributed separately from the above-mentioned analysis method,
Using the means for identifying the abnormal portion from the time difference of occurrence, the results of these two types of analysis, that is, the compared values, and the result of the means for identifying the abnormal portion, the importance of the portion
An abnormality of the elevator, which is provided with an abnormality diagnosing means including means for determining whether to output a signal indicating whether or not the operation can be continued, and means for transferring the diagnosis result and the elevator stop signal to the outside and the elevator control device. Diagnostic device.